* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

.app {
  width: 1200px;
  margin: 0 auto 100px auto;
}
h1 {
  margin: 20px 0;
}
.container {
  display: flex;
}
.code {
  width: 700px;
  margin-right: 40px;
}
.bottom-container {
  display: flex;
  margin-top: 20px;
}
.bottom-item {
  width: 50%;
}
.down-left {
  margin-right: 40px;
}
.form {
  border: 1px solid #ebebeb;
  flex: 1;
}
.btn-wrapper {
  margin-bottom: 10px;
}
.btn-item {
  background: #409eff;
  border-color: #409eff;
  padding: 8px 12px;
  font-size: 14px;
  border-radius: 4px;
  outline: none;
  border: 0;
  margin-right: 8px;
  color: #fff;
  cursor: pointer;
}
